After the blood essence pill was practiced, Lu Yao began to swallow the blood essence pill in one gulp after a short rest, sat cross-legged near the Dan furnace, and began to absorb the medicinal power of the blood essence pill, while leaving the territory was to protect Lu Yao on the side.

It took about two hours to refine the Blood Essence Pill, and the medicinal power of the Blood Essence Pill was relatively less consumed, and everything was done in about half an hour. Next, Lu Yao needed to use the medicinal effect of the Blood Essence Pill to refine the carrion grass into the carrion pill in one go, and then use the carrion pill to refine the dragon's back.

As concocted, Lu Yao began to refine the pill again, the difficulty of refining the carrion grass is naturally several times more difficult than the blood lingzhi, Lu Yao spent nearly five hours refining the carrion grass into the carrion pill, and this time although he has been alchemy for a long time, he does not feel tired at all, but feels that there is inexhaustible strength in the body, and the person's mental state is also unusually full, as if he has rested for a long time, not at all like a person who has practiced alchemy for five hours.

Of course, Lu Yao knew that all this was not due to his own cultivation, but because he had swallowed the Blood Essence Pill, and the medicinal power of the Blood Essence Pill worked in his body.

After the rotting corpse pill is practiced, the next step is the crucial process of refining the dragon's spine, this process, to be honest, let alone Lu Yao, even if it is to leave the territory, there is no complete certainty.

However, because the most powerful medicinal power of the Blood Essence Pill at the beginning could not be maintained for long, Lu Yao had to complete all this in one go, and after discussing it, the master and apprentice decided to try it boldly, even if they failed in the end, they could not leave any regrets, this is what Lu Yao told him.

Lu Yao grinded the Rotting Corpse Pill into powder with all the tools prepared in advance according to what Lijiang said, and then added some of the so-called rootless water that he had collected every morning, and then when everything was ready, he slowly soaked the dragon's spine about one meter long into the potion made from the Rotting Corpse Pill little by little.

"Poof!"

As soon as the dragon's spine was soaked in the potion made from the carrion pill, a pungent white mist appeared, enveloping the entire space, and it was impossible to see anything clearly.

The potion transformed into the Rotting Corpse Pill was too powerful, and Lu Yao didn't dare to move the dragon's spine easily, so he could only quietly wait until the time passed minute by minute, and wait until all the fog was all dispersed before making plans.

This scene reminded Lu Yao of a kind of thing in a TV series he once watched, which can be said to be a necessary thing for killing people, destroying corpses, and destroying corpses, it only takes a little bit to corrode the corpse of an adult elephant cleanly, and nothing can be seen except a puddle of pus, and no one knows where that pool of thick water came from.

After more than an hour, the white mist finally dissipated, and Lu Yao could finally see the appearance of the dragon's spine lying quietly in the potion made of the carrion pill.

Although the dragon's spine is very precious and very hard, its color is no different from that of ordinary animal bones, it is all white and white, but after being soaked in the potion made of the carrion pill, it has completely changed, and the dragon's spine at this time looks black, as if it is a piece of 10,000-year-old pig iron, even if it is separated by a layer of water ripples, Lu Yao still feels the deep coldness and strength in it.

"The medicinal effect of the Rotting Corpse Pill has all disappeared, you can directly fish out the dragon's spine with your hands!" Lijiang looked at Lu Yao, who was still deeply jealous of the potion made into the rotting corpse pill, and said with a slight smile.

When Lu Yao heard this, he was overjoyed, and without saying a word, he directly fished out the dragon's spine from the water and carried it in his hand like a soft whip.

"Master, how do I feel that this dragon's spine has become unusually soft, can this really be used as a weapon?" Lu Yao asked with some confusion after feeling it.

"Give it to me!" Lijiang didn't rush to explain anything, but took the dragon's back from Lu Yao's hand after saying a word.

"Click1"

Lijiang grabbed one end of the dragon's spine, and then suddenly struck, and at once it was drawn on a huge rock prepared in advance, only to hear a crisp sound, like the sound of glass breaking, the huge rock split in half from the place where the dragon's spine slashed, and its incision was as smooth as a mirror, as if it had been cut by a divine blade.

"This power ......" Lu Yao looked at this situation, and he didn't know how to describe it.

It's just that this is just the beginning, I saw Lijiang's wrist shake, and suddenly, the dragon's spine, which was as soft as a whip, suddenly changed. If Lu Yao hadn't known the original form of this dragon's back, he wouldn't have believed that it was a weapon like a soft whip, only to see it poke straight at the rock that had been split in half before leaving the territory like a sharp sword.

This time, there was no sound, and even with Lu Yao's keen perception, he didn't feel any air fluctuations around him, but the dragon's spine did pass through the two rocks like a sharp sword, piercing the two rocks like a rock sugar gourd.

"Master, what's going on?" Lu Yao looked at Lijiang very puzzled and asked.

Lijiang smiled slightly, handed back the dragon spine in his hand to Lu Yao, and said: "This dragon spine is a rare treasure, after the refining of the carrion pill, it can now be said to be the most powerful weapon in the world, if it is held in the hands of ordinary people, it is an indestructible soft whip, but if it is in the hands of immortal cultivators, it only needs to inject the immortal power into its own body, it can become an incomparably hard weapon, and what is even more difficult is that with the improvement of the user's strength, the purer the immortal power, but the stronger, its sharpness can also be increased, In other words, this thing in your hands will multiply in power as your strength increases. ”

"I'll go, so tough?" Lu Yao's mouth opened wide, and he couldn't help but say.

This is the first time Lu Yao has heard that there will be weapons in this world that can increase their power according to the improvement of the user's strength, this is really an invincible existence, compared to the previous rusty sword, the gap between the two is really not something that can be described in a moment.

Of course, after all, Lu Yao still needs to try it himself.

With the dragon's spine in his hand, he first twitched lightly at the two rocks that were pierced by Lijiang, just like what Lijiang had done before, the two rocks were divided into four after being pumped by the dragon's back, and all this was only understood after Lu Yao tried it himself, it turned out that all this was like chopping melons and vegetables, and it was effortless.

After trying for the first time, Lu Yao quickly injected the immortal power in his body into the dragon's spine, this time, Lu Yao once again witnessed everything he had done before leaving the frontier, the dragon's spine changed from soft to hard, and everything was backhanded, as if holding an indestructible sword in his hand, the rock was cut in half again.

"What a baby!" Lu Yao sighed in his heart after trying it himself.

However, Lu Yao quickly thought of another question, that is, such a divine weapon must have a well-known name, otherwise it is really a little sorry for this baby, the dragon's spine can be said to be its original appearance, but as a weapon The name is obviously very inappropriate, you can't ask you what kind of weapon this is, you can directly tell others that your weapon is called the dragon's back.

It's also too ugly to hear.

What should I call it?

"Master, what do you think of the name Zhutian Sword?" Lu Yao thought about it, and felt that one of the burdens on his shoulders was to eradicate the Heavenly Tower Organization, and this dragon spine refining weapon must be his most suitable weapon in the future, and after thinking about it, he looked at Lijiang and asked.

"Heavenly Sword?" Lijiang silently recited it, his face was happy, and he said: "I know that although you didn't all want to eradicate the so-called Heavenly Tower Organization in the end, this name is also very good, besides, our immortal cultivators are going against the sky, and the word Zhutian is also very suitable, so let's call it Zhutian Sword!" ”

When Lu Yao heard that what Lijiang said was all what he thought in his heart, he was in a better mood, and shouted twice in a row: "Zhutian Sword, Zhutian Sword!" ”

After more than ten hours of fatigue, the Blood Essence Pill was practiced, Lu Yao had already absorbed most of the medicinal power of the Blood Essence Pill, and also refined the Rotting Corpse Pill and refined the dragon's spine in one go, and by the time all this was completed, it was already five or six o'clock in the afternoon, and the master and apprentice returned to the residence of Yunzhong Pavilion with the Zhuxian Sword.

……

……

"Damn, forget about this completely, it's troublesome!" After Lu Yao returned to the room, he originally wanted to play with the Zhuxian Sword for a while, but when he saw the mobile phone that he had forgotten on the table, he suddenly felt a burst of distress in his heart, grabbed the mobile phone, and when he saw that there were almost twenty missed calls from Lin Jiayi on it, guilt and self-blame welled up in his heart.

He forgot what Lin Jiayi told before they separated last night, today is the time for him to fulfill his promise to Lin Jiayi, and he promised to fulfill Lin Jiayi's wish and accompany her to a place.

This is the first time Lu Yao has missed an appointment, and it is also the first time that he feels that he has done too much, in the past, he has always done his best to do the best things promised people, even if it is an ordinary friend, let alone one of Lin Jiayi and Huang Ruoyun, he just imagined that if he was Lin Jiayi, he would definitely hate each other to death at this time.

However, Lu Yao also knew that he could refine the Blood Essence Pill, the Rotting Corpse Pill, and the Rotting Corpse Pill, but he didn't have the ability to refine the Regret Pill, the matter had already happened, and no matter how much self-blame he had, it would be useless, what he needed to do was to do everything possible to make up for it.

hurriedly dialed Lin Jiayi's phone, but the phone kept ringing, but no one answered there.

Lu Yao blamed himself for a while, and hurriedly packed up and drove to Xijing University.